I have got at&t unlocked phone and I haven't had any problem from above an year but I have been having signal problems from two weeks now. Messages come and go after hours, sometimes they are quick. It's like my phone is on it's own mood whether to send or not. When I try to check credits I get the error "Connection problem or inavlid MMI code". Sometimes my phone's carrier disappear too. Signals are all full. I tried porting into another carrier and found no difference at all.
I think it's related to IMEI because when I *#06# then a pop comes written "0" on it instead of showing IMEI code. Please help! Thanks!
I think it's related to IMEI because when I *#06# then a pop comes written "0" on it instead of showing IMEI code. Please help! Thanks!